CN201751604U

CN201751604U - Lock nut

Info

Publication number: CN201751604U
Application number: CN2010202738224U
Authority: CN
Inventors: 陈锡瑜
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-28
Filing date: 2010-07-28
Publication date: 2011-02-23
Anticipated expiration: 2020-07-28

Abstract

The utility model relates to a lock nut, wherein the upper end of the lock nut is provided with an axial force application unit, the middle is a nut body, and the bottom end is provided with embossing anti-skidding shallow teeth-shaped grains preventing slipping and reversion; and the upper end and the lower end of the lock nut can form tensile force when thermal expansion of the bolt generates to prevent looseness, thus ensuring that the lock nut can not loosen due to expansion and contraction or shaking of external force, achieving the safety and shakeproof functions, and being different from the traditional nut.

Description

Jam nut

Technical field

The utility model relates to a kind of jam nut, particularly can prevent the bolt nut that gets loose with shaking that is heated about a kind of high-tension distribution panel that is used for.

Background technique

After utilizing the elastic washer (spring washer) of thin discs shape adjoining conventional screw cap, combine, for a kind of habit that extensively is used has fixing anti-loose mode with bolt.Do not needing anti-loose especially occasion, also can be only with general nut directly and bolt do and screw togather and fix.Above-mentioned two kinds of methods commonly used are processing modes of generally commonly using for a long time.

In addition, some improvement creation that screw togather anti-loose are arranged also, some is two nuts to be overlapped screwing togather bolt, utilize two between nut surface friction drag and produce asymmetricly apart from elementary errors with respect to pitch (Pitch), reach and prevent the purpose that gets loose.Moreover, have again in the waist lateral part of nut to section finedraw, produce micro-elastic with similarly asymmetric apart from elementary errors with respect to the pitch generation, prevent to get loose.It is to have technology to produce to prevent the effect that gets loose in conjunction with two or more habits that some skill and technique are also arranged.

In any case but the above-mentioned various technology that prevent that nut from getting loose all are to consider simple mechanical shock factor, as for being applied on the motor in the high-tension distribution panel, can prevent the nut that bolt is heated and gets loose with complicated factor such as shaking, then still there is not more effective mode.

In any case, on motor, in the high-tension distribution panel, be to work as conductor, and use bolt combination mutually with a plurality of thick copper coins.When thick copper coin metallic conductor when the big electric current, can expand because of heat conducting phenomenon, and the feasible fixedly nut of usefulness is pushed the generation offset phenomena; Relatively, when electric current no longer by the time, then thick copper coin metallic conductor can slowly cool off and be returned to original volume.In addition, thick copper coin metallic conductor is when the big electric current, the fine vibrations that can produce extremely high frequency because of the influence of electronic current.These factors understand forming the gap gradually in energising and off-position repeatedly under the situation of effect between nut and the metallic conductor that is fixed, cause the phenomenon that gets loose.Owing to by the relation of big electric current,, all can thereby produce the phenomenon of bad connection,, the phenomenon of thermal expansion is increased, the generation vicious circle so the formation impedance is risen and heating causes loss even if imperceptible gap is arranged.The most serious situation even may make a certain copper coin drop because nut gets loose cause phase fault causes worker's peace accident improperly such as fault current.

Though the annual fixedly situation that must maintenance at least twice thick copper coin metallic conductor of high-tension distribution panel regulation manyly causes the accidental event of phase fault still to emerge in an endless stream because of thick copper coin drops.

With above-mentioned reason, on many hangers, because expose to the weather, changes of weather causes the phenomenon of expanding with heat and contract with cold, and the phenomenon that causes nut to get loose because of natural disaster such as typhoon, earthquake, fire external force collision improperly, vibrations, thereby cause bad consequence.

These problems exist for a long time, and the utility model claimant proposes design at the problems referred to above, uses a kind of feasible easy method to properly settle.

Summary of the invention

The purpose of this utility model is to provide a kind of simple structure, but can improves the anti-loose nut that expands with heat and contract with cold and shake, and it is specially adapted to high-tension distribution panel and prevents that bolt from getting loose.

For achieving the above object, the utility model designs a kind of nut, and it fixes an elasticity axial force distribution unit near the position, upper end.When bolt and this nut screw togather, this elasticity axial force distribution unit can be along between the screw thread of bolt and embed and temporary local deformation, utilize elasticity axial force distribution unit and the mutual axial tensile force that takes place of bolt and the frictional force of nut, prevent that bolt and this nut from getting loose.

This first kind of design in elasticity axial force distribution unit is a resilient pad, is preferably the C type resilient pad of opening shape, and if possible, is preferably in this nut near fixing most the C type resilient pads in position, upper end.The another kind of design in this elasticity axial force distribution unit is to utilize spring ring.So the way structure is simpler and easy, is more prone to install, and more economically, effect is identical with function on the multi-disc C type resilient pad embedding nut.

The further design of the utility model, on conventional screw cap, along the hand of spiral cross cutting or cut sth. askew, its several cuttves or multitool also can reach the effect as spring stress, expand with heat and contract with cold or external force is done the time spent when running into, groove and bolt can be because of the outside destroy balances, and then form distortion a little, and both more closely combine together to make it, and can't advance and retreat, reach the purpose that does not get loose.

Again more preferably, relevant nut bottom, no matter be traditional type or cone body, its bottom adds for the anti-skidding and anti-anti-skidding shallow dentation line of embossing that reverses, is umbellate form embossing screw thread for example, perhaps mode such as strip embossing screw thread, so combine and be in the same place,, more strengthen its tension force and represent higher reliability when when external force shakes or expands with heat and contract with cold with above-mentioned function, and, be more suitable for using this perfect anti-loosing device on irregular plane.

All-in-one-piece combination like this in the combination and more superior on the maintainability, can prevent any reverse and expands with heat and contract with cold and shake the displacement that causes and get loose.

The effect of the utility model, be improve conventional screw cap can't effectively anti-loose shortcoming.Design of the present utility model when vibrations or cold and hot difference variation when very big, can produce the strength of mutual axial push, even the factor of any external force is arranged, it is mobile also can to allow bolt and nut combine closely.The anti-skidding shallow dentation line of embossing is arranged at the bottom again, can make nut and contactant more closely together, and can reach anti-skidding, anti-reverse and anti-loose function.

The utility model improve because the conductor of high voltage power distribution when crossing electricity, cause conductor because when expanding with heat and contract with cold, the phenomenon that causes displacement or get loose is for example when the motor copper bar links, the incipient fault reason that gets loose that produces is perhaps because external force vibrations etc. cause the phenomenon that gets loose.

Description of drawings

Fig. 1 is the plan view of the anti-loose nut of the utility model.

Fig. 2 is the side view of the anti-loose nut of the utility model.

Fig. 3 is the worm's eye view of the anti-loose nut of the utility model.

Fig. 4 is that the anti-loose nut of explanation the utility model combines with bolt, utilizes elasticity axial force distribution unit and the mutual axial tensile force that takes place of bolt and the frictional force of nut, reaches anti-loose schematic illustration.

The primary clustering symbol description:

10. nut; 11. nut body; 131. the anti-skidding shallow dentation line of embossing; 20. elasticity axial force distribution unit; 30. bolt; 31. screw thread edge; 32. resistance point.

Embodiment

Below by preferable specific embodiment, conjunction with figs. illustrates the purpose of this utility model, technology contents, characteristics and the effect of being reached thereof.

The schematic representation of preferred embodiment as shown in Figure 1 to Figure 3, nut 10 of the present utility model comprises nut body 11, position, upper end 12 and lower end part 13; It fixes an elasticity axial force distribution unit 20 near position, upper end 11.

The embodiment of this elasticity axial force distribution unit 20 is resilient pads, is preferably ringent C type resilient pad, and itself and fixed by nut are together.The lower end part 13 of this nut 10, as shown in Figure 3, its bottom is for there being the anti-skidding shallow dentation line 131 of embossing, after making that the screw threaded of the utility model and fixture is fixing, the two ends up and down of this nut 10 form tension force mutually and can prevent to get loose, guarantee not because of being directly delivered to expanding with heat and contract with cold of bolt, perhaps become flexible, reach the function of safety anti-vibration because of the external force vibrations.

As shown in Figure 4, when bolt 30 and this nut 10 screw togather, but between the screw thread of these elasticity axial force distribution unit 20 stud bolts, because in the embedding screw thread, one side of this elasticity axial force distribution unit 20 is bent upwards along with the resistance point 32 of screw thread edge 31, another side then is bent downwardly and temporary local deformation, utilizes nut 10 interior elasticity axial force distribution unit 20 and bolt 30 mutual axial tensile force that takes place and frictional force, prevents that bolt and this nut from getting loose.Rotating screw cap 20 unless tool using is exerted oneself, otherwise the resistance that elasticity axial force distribution unit 20 is produced can make whole nut 10 motionless.

Though above stated specification lists some preferable examples with Chen Ming feasibility of the present utility model, as is well known, it is not in order to limit the utility model.Any those who are familiar with this art in not breaking away from the spiritual scope of the utility model, can carry out the change of a little equivalence, but all must belong to scope of patent protection of the present utility model.

Claims

1. jam nut, it is characterized in that: fix an elasticity axial force distribution unit near the position, upper end at this nut, when supplying bolt and this nut to screw togather, but between the screw thread of this elasticity axial force distribution unit stud bolt and temporary local deformation, utilize elasticity axial force distribution unit and the mutual axial tensile force that takes place of bolt and the frictional force of nut, prevent that bolt and this nut from getting loose.

2. jam nut as claimed in claim 1 is characterized in that: this nut bottom is provided with for the anti-skidding and anti-anti-skidding shallow dentation line of embossing that reverses.

3. jam nut as claimed in claim 1 is characterized in that: described elasticity axial force distribution unit is a resilient pad.

4. jam nut as claimed in claim 1 is characterized in that: described elasticity axial force distribution unit is a spring ring.

5. jam nut as claimed in claim 3 is characterized in that: described elasticity axial force distribution unit is provided with a plurality of resilient pads.

6. jam nut as claimed in claim 3 is characterized in that: described elasticity axial force distribution unit is ringent C type resilient pad.